{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T08:10:29Z","timestamp":1768551029497,"version":"3.49.0"},"reference-count":31,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T00:00:00Z","timestamp":1591056000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T00:00:00Z","timestamp":1591056000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T00:00:00Z","timestamp":1591056000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["World j. surg."],"published-print":{"date-parts":[[2020,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Some of patients are suffered from pitch lowering of voice after thyroidectomy. We sought to identify factors predictive of a recovery from lowered pitch voice after thyroid surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We retrospectively reviewed the records of 133 patients who underwent total thyroidectomy to treat papillary carcinoma between January 2012 and February 2013. Of these, we enrolled 78 who exhibited a lower\u2010pitched voice (SFF fall\u2009&gt;\u200912\u00a0Hz) at 2 weeks post\u2010operatively than pre\u2010operatively and investigated pitch recovery after 3\u00a0months. We subclassified patients into recovery and non\u2010recovery groups and compared videostroboscopic findings, acoustic voice data, and thyroidectomy\u2010related voice questionnaire scores pre\u2010operatively and 2, 8, and 12 weeks post\u2010operatively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Vocal cord asymmetry on videostroboscopic examination at 2 weeks post\u2010operatively (odds ratio 19.056, <jats:italic>p<\/jats:italic>\u2009=\u20090.001*) was more frequent in the non\u2010recovery group. In acoustic analysis, mean pre\u2010operative SFF was higher in the non\u2010recovery group than the recovery group (190.9 \u00b1\u2009\u200927.5 and 180.9\u2009\u00b1 \u200924.6\u00a0Hz, respectively; <jats:italic>p<\/jats:italic>\u2009=\u20090.030*). Also, a reduction in the SFF of\u2009&gt;\u200919.6\u00a0Hz, at 2 weeks post\u2010operatively versus pre\u2010operatively, predicted non\u2010recovery of pitch\u2010lowering in patients with reduced SFF within post\u2010operative 3\u00a0months, with 72.0% sensitivity and 71.2% specificity. After 6\u00a0months of follow\u2010up, no patient who exhibited an SFF fall\u2009&gt;\u200919.6\u00a0Hz recovered to within 10\u00a0Hz of the pre\u2010operative value.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>A reduction in the speaking fundamental frequency (SFF)\u2009&gt;\u200919.6\u00a0Hz at 2 weeks post\u2010operatively predicted persisting lowering of voice pitch after thyroidectomy among those with lower\u2010pitched voices after surgery. Pre\u2010operative high SFF and post\u2010operative stroboscopic findings including vocal cord asymmetry at 2 weeks post\u2010operatively also predicted persisting lowering of voice pitch for 3\u00a0months.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00268-020-05628-6","type":"journal-article","created":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T15:07:47Z","timestamp":1591110467000},"page":"3395-3404","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["How Can We Predict the Recovery from Pitch Lowering After Thyroidectomy?"],"prefix":"10.1002","volume":"44","author":[{"given":"Sang\u2010Yeon","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Inje University of Korea Busan Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun\u2010Ook","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ja\u2010Seong","family":"Bae","sequence":"additional","affiliation":[{"name":"Department of Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"So\u2010Hee","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yeon\u2010Shin","family":"Hwang","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mi\u2010Ran","family":"Shim","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Young\u2010Hak","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Catholic University of Korea Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dong\u2010Il","family":"Sun","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery, College of Medicine The Catholic University of Korea Seoul Republic of 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